package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrdersMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;

@Slf4j
@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrdersMapper ordersMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 日期列表数据
     *
     * @param begin
     * @param end
     * @return
     */
    private List<LocalDate> getDateList(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        while (!begin.isAfter(end)) {
            dateList.add(begin);
            begin = begin.plusDays(1);
        }
        log.info("dateList={}", dateList);
        return dateList;
    }

    /**
     * 营业额统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        //1.准备日期列表数据
        List<LocalDate> dateList = getDateList(begin, end);
        //2.准备营业额列表数据
        List<Double> turnoverList = new ArrayList<>();
        dateList.forEach(date -> {
            //select sum(amount) from orders where status=5 and order_time between
            Map map = new HashMap<>();
            map.put("status", Orders.COMPLETED);
            map.put("beginTime", LocalDateTime.of(date, LocalTime.MIN));
            map.put("endTime", LocalDateTime.of(date, LocalTime.MAX));
            Double turnover = ordersMapper.sumByMap(map);
            //处理没有营业额的情况
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        });

        //3.构造vo并返回
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    /**
     * 用户统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = getDateList(begin, end);

        List<Integer> newUserList = new ArrayList<>();

        List<Integer> totalUserList = new ArrayList<>();
        dateList.forEach(date -> {
            Map map = new HashMap();
            map.put("beginTime", LocalDateTime.of(date, LocalTime.MIN));
            map.put("endTime", LocalDateTime.of(date, LocalTime.MAX));
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);
            map.put("beginTime", null);
            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
        });
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    /**
     * 订单统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO orderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = getDateList(begin, end);

        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        Integer totalOrderCount = 0;
        Integer validOrderCount = 0;
        for (LocalDate date : dateList) {
            Map map = new HashMap();
            map.put("beginTime", LocalDateTime.of(date, LocalTime.MIN));
            map.put("endTime", LocalDateTime.of(date, LocalTime.MAX));
            Integer totalOrder = ordersMapper.countByMap(map);
            orderCountList.add(totalOrder);

            map.put("status", Orders.COMPLETED);
            Integer validOrder = ordersMapper.countByMap(map);
            validOrderCountList.add(validOrder);
            totalOrderCount += totalOrder;
            validOrderCount += validOrder;
        }

        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = (validOrderCount + 0.0) / totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    @Override
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
        List<String> nameList=new ArrayList<>();

        List<Integer> numberList=new ArrayList<>();
        Map map = new HashMap();
        map.put("beginTime", LocalDateTime.of(begin, LocalTime.MIN));
        map.put("endTime", LocalDateTime.of(end, LocalTime.MAX));
        map.put("status",Orders.COMPLETED);
        List<GoodsSalesDTO> list=  ordersMapper.sumTop10(map);

        for (GoodsSalesDTO dto : list) {
            nameList.add(dto.getName());
            numberList.add(dto.getNumber());
        }
        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList,","))
                .numberList(StringUtils.join(numberList,","))
                .build();
    }

    /**导出近30天的运营数据报表
     * @param response
     **/
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();

        }catch (IOException e){
            e.printStackTrace();
        }
    }

}
